Opera palette
Flannel Depot
From #004677 ink through #006eb6, #2f8ad4, #5299d9 to #6eb6f7 light, Flannel Depot is a analogous progression that holds together at any size. Use it for event posters that compete with a wall of other posters. The darkest and lightest stops clear AA as a text pair.
skyoperafive-stophigh-contrast
#004677
#006eb6
#2f8ad4
#5299d9
#6eb6f7
The generator opens with #004677 as the primary and the next two stops as secondary and accent — adjust, check contrast, and export tokens or CSS from there.